Home / 1,120,389.75-1,680,661.17-321,609.87

Finding the Fourth Proportional to 1,120,389.75, 1,680,661.17 and 321,609.87

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Solution

The fourth proportional to 1,120,389.75, 1,680,661.17 and 321,609.87 is: 482,436.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120,389.75 : 1,680,661.17 = 321,609.87 : x
  2. Step 2: Convert to fraction form
    1,120,389.75/1,680,661.17 = 321,609.87/x
  3. Step 3: Cross multiply
    1,120,389.75x = 1,680,661.17 × 321,609.87
  4. Step 4: Simplify right side
    1,120,389.75x = 540,517,220,397.75
  5. Step 5: Solve for x
    x = 540,517,220,397.75/1,120,389.75
  6. Step 6: Final answer
    x = 482,436.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.